The hardware checks Line $6$ of the cache. If the tag of the cache line matches the tag field of the memory address, then it is a cache hit, and the CPU will access the cache. Otherwise, it is a cache miss, and the memory block is loaded into cache for CPU access.

The hardware checks each of the $8$ entries in Set $6$ of the cache. If for any entry, the valid bit is set and its tag matches the tag field of the memory address, then it is a cache hit, and the CPU will access the cache. Otherwise, it is a cache miss, and the memory block is loaded into cache for CPU access.

The hardware checks each of the $8$ entries in Set $6$ of the cache. If for any entry, the valid bit is set and its tag matches the tag field of the memory address, then it is a cache hit, and the CPU will access the cache. Otherwise, it is a cache miss, and the CPU will directly access the memory.

The hardware checks Line $6$ of the cache. If the tag of the cache line matches the tag field of the memory address, then it is a cache hit, and the CPU will access the cache. Otherwise, it is a cache miss, and the CPU will directly access the memory.